US Patent 6968875 Closeable self-venting spout

A non-spilling detachable pouring spout configured to transfer liquid from a non-vented filling container to a receiving container. This spout having a spout body defining an open passageway extending from an open first end to an open second end this open passageway having a generally tubular shaped hollow inner conduit positioned within the first hollow passageway, and defining a second hollow passageway. An intermediate sleeve is configured for attachment to the device and is further configured to seal against portions of the spout body and the inner conduit so as to variously control the flow of materials out of the spout body. The movement of said sleeve is controlled by movement of a child resistant sheath.